Lens system and method for power adjustment

a technology of power adjustment and lens system, applied in the field of lenses, can solve the problems of large iol patient error, and inability to predict refractive error,

Active Publication Date: 2005-06-30
ALCON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0023] In accordance with another aspect of this invention, the external source that targets and addresses the flow control mechanisms within t...

Problems solved by technology

Since the lens can no longer accommodate, the patient typically needs glasses for reading.
However, in a significant number of cases, after the patient's eye has healed from the cataract surgery, there is a refractive error that could not be predicted.
It is quite common for residual errors after IOL implantation to occur, and in fact, such errors may occur in the vast majority of IOL patients.
T...

Method used

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  • Lens system and method for power adjustment
  • Lens system and method for power adjustment

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Embodiment Construction

[0037] The present invention is directed to an in-situ adjustable lens system, with particular applicability in the fields of implantable intraocular lenses (“IOLs”) and custom contact lenses. As will be described below, the system of the invention also may be utilized to adjust the power of other types of lenses used for vision correction, for example phakic IOLs and contact lenses. For convenience, the system is first described in the context of exemplary in-the-capsule IOLs.

[0038] In accordance with the principles of the present invention, methods and apparatus are provided wherein a lens has a locally deformable surface coupled to a one or more independently actuable fluid-filled actuators or cells. The volume within, and deformation of, the fluid-filled cells is controlled by selective actuation, using an external power source, of individual flow control mechanisms coupled between the cells and one or more reservoirs.

[0039] Subsequent to implantation of the IOL and healing of...

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Abstract

A lens is provided that having optical parameters that may be adjusted in-situ, and is particularly useful as an IOL for use in cataract patients that require an adjustment in the optical power of the lens post-implantation. In one embodiment, the lens body carries an array of interior fluid-filled cells in which fluid is controllably moved upon application of energy from an external source to move a fluid media into or out of the cells to thereby alter the lens surface shape.

Description

REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of priority from U.S. provisional application 60 / 428,173, filed Nov. 20, 2002 (Docket No. S-APV-001) titled “Lens System and Method for Power Adjustment”.FIELD OF THE INVENTION [0002] The present invention relates to lenses having optical parameters that are adjustable in-situ. More particularly, the invention has applications in IOLs for in-capsule implantation for cataract patients, and in contact lenses, wherein an external energy source is applied to the lens to control movement of fluid media within interior cells of the lens, thereby altering the lens curvature to correct aberrations. BACKGROUND OF THE INVENTION [0003] Cataracts are a major cause of blindness-in the world and the most prevalent ocular disease. Visual disability from cataracts accounts for more than 8 million physician office visits per year. When the disability from cataracts affects or alters an individual's activities of daily livin...

Claims

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Application Information

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IPC IPC(8): A61F2/16G02C7/04
CPCA61F2/16A61F2/1613G02C7/085A61F2/1648G02C7/04A61F2/1635A61F2/1601
Inventor ESCH, VICTORSHADDUCK, JOHN H.
Owner ALCON INC
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